fix(deps): bump @oclif/core from 1.20.4 to 1.21.0 (#480)

Bumps [@oclif/core](https://github.com/oclif/core) from 1.20.4 to 1.21.0.
- [Release notes](https://github.com/oclif/core/releases)
- [Changelog](https://github.com/oclif/core/blob/main/CHANGELOG.md)
- [Commits](oclif/core@1.20.4...1.21.0)

---
updated-dependencies:
- dependency-name: "@oclif/core"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -5,7 +5,7 @@
   "bugs": "https://github.com/oclif/plugin-update/issues",
   "dependencies": {
     "@oclif/color": "^1.0.2",
-    "@oclif/core": "^1.18.0",
+    "@oclif/core": "^1.21.0",
     "cross-spawn": "^7.0.3",
     "debug": "^4.3.1",
     "filesize": "^6.1.0",

yarn.lock

@@ -432,10 +432,10 @@
     supports-color "^8.1.1"
     tslib "^2"
 
-"@oclif/core@^1.0.8", "@oclif/core@^1.18.0", "@oclif/core@^1.2.1", "@oclif/core@^1.20.4", "@oclif/core@^1.3.0":
-  version "1.20.4"
-  resolved "https://registry.yarnpkg.com/@oclif/core/-/core-1.20.4.tgz#7378b52e1f1b502e383ffb07f95dffc9fd8588ff"
-  integrity sha512-giug32M4YhSYNYKQwE1L57/+k5gp1+Bq3/0vKNQmzAY1tizFGhvBJc6GIRZasHjU+xtZLutQvrVrJo7chX3hxg==
+"@oclif/core@^1.0.8", "@oclif/core@^1.2.1", "@oclif/core@^1.20.4", "@oclif/core@^1.21.0", "@oclif/core@^1.3.0":
+  version "1.21.0"
+  resolved "https://registry.yarnpkg.com/@oclif/core/-/core-1.21.0.tgz#d91b2f40a4f446279ab6335c619fc1716fc23ab6"
+  integrity sha512-B/AKYfHcNRAbb6Xz2kj0FlH9gWEi8aFS4iEr7EzguP3E2DpDk4wcf7eOMOfJYEmhuVd9sOpVWSnI2yP+FL/3Sg==
   dependencies:
     "@oclif/linewrap" "^1.0.0"
     "@oclif/screen" "^3.0.3"